Method and apparatus for transmitting/receiving wireless signal in wireless communication system

A device for wireless communication, the device comprising:

• a memory configured to store instructions;
• and
• a processor configured to perform operations by executing the instructions, the operations comprising:
• receiving a first system information block (SIB) including a system information (SI) request-related configuration including a physical random access channel (PRACH) configuration;
• transmitting a random access (RA) preamble for an SI request based on the PRACH configuration;
• and
• receiving, in response to the RA preamble for the SI request, a second SIB different from the first SIB,
• wherein the SI request-related configuration includes first information related only to a first type device with reduced capability to support a smaller bandwidth (BW) than a second type device, and second information that is common for the first type device and the second type device, and
• wherein the device is the first type device and performs the RA preamble transmission by determining a specific RA association period and a specific RA occasion (RO) based on both of the first information and the second information in the SI request-related configuration.